Step 1: Materials

5 pieces of wood (multilayer or MDF), the size of wood depends on the size of the sofa. I used 110 cm x 120cm (43 x 47 inches)

Screwdriver (better if electric)

Electric saw

Lot of screw

Metal bars to connect wood pieces

Sheets of paper (better if they are big)

Tape

High density Foam (10 cm)

Low density Foam (3 cm)

Lot of fabric

Thin plywood

Step 2: Get the shape

Put together all the sheets of paper in a big one (using tape). You will use the sheet to take the shape of your sofa. Put the big sheet on the ground and press it along the angles so that it fit al the curves and lines of the furniture. The result should be like the one on the photo (I still store the paper shape)

Step 3: Cut the wood pieces

Put the paper shape on wood and with a pencil draw the shape onto the wood. Then start cutting the wood with the saw. TAKE YOUR TIME, you want this job done well!

If the wood do not fit perfectly try to adjust using the saw and cutting little bits of wood.

Step 4: Add legs to the sofa

To build a strong sofa I used a lot of legs cutted out from the 5th piece of wood. I fixed the legs to the bottom wood with a lot of L shaped metal bars. Before proceeding I tested that the home theater fit into the central box.

1 critique though: recievers are notorious for giving off quite a bit of heat and can overheat without proper ventilation. Were there any concerns that this design does not provide adequate ventilation for your equipment?

You could add a heated blanket under the fabric layer. I don't think this would pose any more of a fire hazard than a heated blanket normally would. (Which is to say not much, but if you find yourself on fire I was wrong.) -Olaf

You need to firs sew the fabric on the reverse side without the foam leaving a part not sewed. Then you reverse the fabric through the not-sewed part (you should get a nice empty fabric bag). Then you need to put the foam inside the fabric bag through the not sewed part. If you keep everything squared it should be quite easy. Then you need to close the not sewed part (I used a zip, but you can also use velcro)

im moving into a new house n my room doesn't have much space so this gave me a great idea to mcguiver a bed using this method and put my stereo under it! and somehow put the jacks like on a plate screwed into the plywood